摘要
取３月龄断奶小尾寒羊９只随机分为３组（每组１只去势公羊，２只母羊）进行气体能量代谢试验。试验表明，日粮代谢能浓度为２３００～２７００ｋｃａｌ／ｋｇＤＭ、食入代谢能２６００～４８００ｋｃａｌ／ｋｇＤＭ时，甲烷气（ＣＨ４）呼出量２４～３３Ｌ／ｄ，ＣＨ４能（ＣＨ４Ｅ）２２０～３１０ｋｃａｌ／ｄ，甲烷能占食入总能的６％～９％，呼出气体甲烷浓度约为０１０％～０１７％。甲烷能与食入总能回归关系为：３～５月龄：ＣＨ４呼出量（Ｌ／ｄ）＝８７１０６＋０００５２ｘ；ＣＨ４Ｅ（ｋｃａｌ／ｄ）＝７８９７２７＋００５００ｘ；ＣＨ４Ｅ／ＧＥＩ（％）＝１０１５０４－００００８ｘ。５～７月龄：ＣＨ４呼出量（Ｌ／ｄ）＝１１５２１５＋０００４５ｘ；ＣＨ４Ｅ（ｋｃａｌ／ｄ）＝１０８８８３０＋００４２８ｘ；ＣＨ４Ｅ／ＧＥＩ（％）＝１１９４４１－０００１２ｘ。
? Nine three month old littlefattail sheep were randomly divided into 3 groups for gas and energy metabolism trialIn each group there were one wether hogg and two ewes lambsThe trial showed when the diatary metabolizable energy concentration was between 2300 to 2700 kcal/kgDM and the total metabolizable energy intake was between 2600 to 4800 kcal/d,the amount of CH4 gas output was 24～33L/d and the CH4 energy loss was 220～310kcal/d,the ratio of methane to total energy intake were 6%～9%,The methane concentration in exhaled gas was 010%～017%The regression equations of CH4 and total energy intake were as follows:in period 3～5months:CH4(L/d)=87106+00052x;CH4E(kcal/d)=789727+00500x;CH4E/GEI(%)=101504-00008x;in period 5～7months;CH4(L/d)=115215+00045x;CH4E(kcal/d)=1088830+00428x;CH4E/GEI(%)=119441-00012x
出处
《动物营养学报》
CAS
CSCD
1998年第2期27-34,共8页
CHINESE JOURNAL OF ANIMAL NUTRITION
基金
国家自然科学基金
关键词
小尾寒羊
能量水平
甲烷
Littlefattail sheep,Energy levels,Methane
